Lock Through Tube Valve Pipe Fittings for Greenhouse Irrigation. Factory Direct Supply: DFS is a manufacturer providing low prices and direct supply without middlemen. Flexible Customization: OEM and ODM services available with flexible customization options for products. Fast Delivery: Fast delivery with enough stock; mass orders take 10-30 days, samples within one week. Free Sample Checking: Free samples provided for quality checking; freight refunded after placing a mass order. Strict Quality Control: 100% inspection including visual and function checks before packaging for shipment. Wide Application: Suitable for drip, pipe, and sprinkler irrigation systems with various fittings.